The Daily Clarion hires detective story writer Steve Colt to investigate the deaths of a group of scientists working on an atomic rocket development project. Behind the killings is fortune teller Sombra, a spy from an Asian country intent on world domination, who is determined to pilfer the atomic rocket by luring workers from the project to her parlor and killing them with black widow spider venom when they refuse to cooperate.
Bruce Edwards
as Steve Colt
Virginia Lee
as Joyce Winters (as Virginia Lindley)
Carol Forman
as Sombra, The Black Widow
Anthony Warde
as Nick Ward
Ramsay Ames
as Ruth Dayton
I. Stanford Jolley
as Dr. Z.V. Jaffa
Dave Anderson
as Porter-Spy
Theodore Gottlieb
as Hitomu
Virginia Carroll
as Dr. Ann Curry
Gene Roth
as John M. Walker
Sam Flint
as Prof. Henry Weston
LeRoy Mason
as Dr. Godfrey
